diff --git a/src/OpenGL/libGL/libGL.vcxproj b/src/OpenGL/libGL/libGL.vcxproj
index 88a7203..507c8e4 100644
--- a/src/OpenGL/libGL/libGL.vcxproj
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@@ -142,7 +142,7 @@
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-      <AdditionalIncludeDirectories>$(SolutionDir);$(ProjectDir)/..;$(ProjectDir)/../..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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@@ -168,7 +168,7 @@
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+      <AdditionalIncludeDirectories>$(SolutionDir)\src;$(ProjectDir)/..;$(ProjectDir)/../..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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diff --git a/src/OpenGL/libGLES_CM/libGLES_CM.vcxproj b/src/OpenGL/libGLES_CM/libGLES_CM.vcxproj
index e702386..95b0101 100644
--- a/src/OpenGL/libGLES_CM/libGLES_CM.vcxproj
+++ b/src/OpenGL/libGLES_CM/libGLES_CM.vcxproj
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@@ -152,7 +152,7 @@
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     <ClCompile>
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-      <AdditionalIncludeDirectories>$(SolutionDir);$(ProjectDir)/..;$(ProjectDir)/../..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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diff --git a/src/OpenGL/libGLESv2/libGLESv2.vcxproj b/src/OpenGL/libGLESv2/libGLESv2.vcxproj
index 0834144..36e8e46 100644
--- a/src/OpenGL/libGLESv2/libGLESv2.vcxproj
+++ b/src/OpenGL/libGLESv2/libGLESv2.vcxproj
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@@ -152,7 +152,7 @@
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     <ClCompile>
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-      <AdditionalIncludeDirectories>$(SolutionDir);$(ProjectDir)/..;$(ProjectDir)/../..;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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